Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
46561 (1991 RQ)
Classification: Main-belt Asteroid          SPK-ID: 2046561
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2731404205827017 4.3181e-08  
a 2.366838541938324 1.2398e-08 au
q 1.720359267141941 1.0522e-07 au
i 13.03664811376733 4.63e-06 deg
node 151.8851609188137 2.0864e-05 deg
peri 187.3967953645037 2.2905e-05 deg
M 217.1582303604565 1.4467e-05 deg
tp 2459128.220660353616
(2020-Oct-05.72066035)
5.6383e-05 TDB
period 1329.999188659652
3.64
1.045e-05
2.861e-08
d
yr
n .2706768568504174 2.1268e-09 deg/d
Q 3.013317816734706 1.5785e-08 au
  Orbit Determination Parameters
   # obs. used (total)      836  
   data-arc span      10122 days (27.71 yr)  
   first obs. used      1991-08-07  
   last obs. used      2019-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61274  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:38:15  

Additional Information
 Earth MOID = .711026 au 
 Jupiter MOID = 2.38657 au 
 T_jup = 3.463 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456777.5 (2014-Apr-30.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2713482103073984 4.2926e-08  
q 1.726015140383457 1.0437e-07 au
tp 2456465.208368454678
(2013-Jun-21.70836845)
4.4129e-05 TDB
node 151.9226130109903 2.0893e-05 deg
peri 187.105329736154 2.2968e-05 deg
i 13.01896468059189 4.621e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      836  
   data-arc span      10122 days (27.71 yr)  
   first obs. used      1991-08-07  
   last obs. used      2019-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61274  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:38:15  

Additional Information
 Jupiter MOID = 2.38657 au 
 T_jup = 3.463 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.842669932680126E-15 -4.464679890745346E-15 -6.215581414564322E-14 1.941355399659557E-15 4.244465119634467E-14 -1.18665921170606E-15
q -4.464679890745346E-15 1.089298284789472E-14 3.32555589621571E-13 -4.99310913722083E-15 -6.002379445248315E-14 4.231848901443909E-15
tp -6.215581414564322E-14 3.32555589621571E-13 1.947352441637062E-9 9.774982290295135E-12 4.44020149384046E-10 1.09070036858981E-11
node 1.941355399659557E-15 -4.99310913722083E-15 9.774982290295135E-12 4.365307258233644E-10 -4.229469432029744E-10 2.858393707116157E-11
peri 4.244465119634467E-14 -6.002379445248315E-14 4.44020149384046E-10 -4.229469432029744E-10 5.275140113428625E-10 -2.540117346670007E-11
i -1.18665921170606E-15 4.231848901443909E-15 1.09070036858981E-11 2.858393707116157E-11 -2.540117346670007E-11 2.135396482699953E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO337630  
diameter diameter 4.710 km 1.082 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.069   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

46561 (1991 RQ)          Discovered 1991-Sep-07 by Helin, E. F. at Palomar
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 RQ = 1991 PN16 = 2000 AA182 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-14 17:22 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin